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issue 8 - april 2007 1 www.zetex.com ? zetex semiconductors plc 2007 ztl431, ztl432 cost effective adjustable precision shunt regulator description the ztl431 and ztl432 are three terminal adjustable shunt regulators offering excellent temperature stability and output current handling capability up to 100ma. the output voltage may be set to any chosen voltage between 2.5 and 20 volts by selection of two external divider resistors. the devices can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. features ? temperature range ................ -40 to 125c ? reference voltage tolerance at 25c ? 0.5% ..................................... b grade ? 1% ......................................... a grade ? low output noise ? 0.2 typical output impedance ? sink current capability ...... 1ma to 100ma ? adjustable output voltage ...... v ref to 20v pin connections the ztl432 has the same electrical specifications as the ztl431 but has a different pin out in sot23 (f-suffix) and sot23f (ff-suffix). both variants are available in 2 grades with initial tolerances of 1% and 0.5% for the a and b grades respectively. these are functionally equivalent to the tl431/ tl432 except for maximum operation voltage, and have an ambient temperature range of -40 to 125c as standard. applications ? opto-coupler linearization ? linear regulators ? improved zener ? variable reference 1 cathode ztl431_f sot23 ztl431_ff sot23f (top view) ztl432_f sot23 ztl432_ff sot23f (top view) ref ref cathode 2 3 anode anode 1 2 3 1 2 3 6 5 4 ztl431_h6 sc70-6 (top view) cathode * ref anode * nc preview
ztl431, ztl432 issue 8 - april 2007 2 www.zetex.com ? zetex semiconductors plc 2007 ordering information absolute maximum ratings cathode voltage (v ka ) .............................................................. 20v continuous cathode current (i ka ) ........................................ 150ma reference input current range (i ref )..................... -50 a to 10ma operating junction temperature ................................. -40 to 150c storage temperature ................................................... -55 to 150c operation above the absolute maximum rating may cause device failure. operation at the absolute maximum ratings, for extended periods, may reduce device reliability. unless otherwise stated voltages specified are relative to the anode pin. package thermal data tol. order code pack part mark status * reel size tape width (mm) quantity per reel 1% ztl431acstz to92 ztl431a active concertina n/a 1500 ztl431ae5ta sot23-5 31a preview * 7?, 180mm 8 3000 ztl431affta sot23f 31a active 7?, 180mm 8 3000 ztl431afta sot23 31a active 7?, 180mm 8 3000 ZTL431AH6TA sc70-6 31a preview * 7?, 180mm 8 3000 ztl431azta sot89 31a preview * 7?, 180mm 12 1000 ztl432affta sot23f 32a active 7?, 180mm 8 3000 ztl432afta sot23 32a active 7?, 180mm 8 3000 0.5% ztl431bcstz to92 ztl431b preview * concertina n/a 1500 ztl431be5ta sot23-5 31b preview * 7?, 180mm 8 3000 ztl431bffta sot23f 31b preview * 7?, 180mm 8 3000 ztl431bfta sot23 31b active 7?, 180mm 8 3000 ztl431bh6ta sc70-6 31b preview * 7?, 180mm 8 3000 ztl431bzta sot89 31b preview * 7?, 180mm 12 1000 ztl432bffta sot23f 32b active 7?, 180mm 8 3000 ztl432bfta sot23 32b active 7?, 180mm 8 3000 notes: * for availability of pre-production status devices contact your local zetex representative package ja p dis t a =25c, t j = 150c to92 160c/w 780mw sot23 380c/w 330mw sot23f 138c/w 900mw sot23-5 250c/w 500mw sot89 125c/w 1000mw
ztl431, ztl432 issue 8 - april 2007 3 www.zetex.com ? zetex semiconductors plc 2007 recommended opera ting conditions electrical characteristics electrical characteristics over recommended operating conditions, t a = 25c, unless otherwise stated. min max units v ka cathode voltage v ref 20 v i ka cathode current 1 100 ma t a operating ambient temperature range -40 125 c symbol parameter conditions min. typ. max. units v ref reference voltage v ka = v ref i ka = 10ma ztl43_a 2.475 2.5 2.525 v ztl43_b 2.487 2.5 2.513 v dev deviation of reference voltage over full temperature range v ka = v ref i ka = 10 ma t a = 0 to 70 6 16 mv t a = -40 to 85c 14 34 t a = -40 to 125c 14 34 v ref v ka ratio of change in reference voltage to the change in cathode voltage i ka = 10ma v ka = v ref to 10 -1.4 -2.7 mv/v v ka = 10v to 20v -1.0 -2.0 i ref reference input current i ka = 10ma, r1 = 10k r 2 = oc 24a i ref i ref deviation over full temperature range i ka = 10ma r 1 = 10k r 2 = oc t a = 0 to 70c 0.8 1.2 a t a = -40 to 85c 0.8 2.5 t a = -40 to 125c 0.8 2.5 i ka(min) minimum cathode current for regulation v ka = v ref 0.4 0.6 ma i ka(off) off state current v ka = 20v, v ref = 0v 0.1 0.5 a r z dynamic output impedance v ka = v ref , f = 0hz 0.2 0.5
ztl431, ztl432 issue 8 - april 2007 4 www.zetex.com ? zetex semiconductors plc 2007 typical characteristics i ka = 10ma v ref = v ka 125
ztl431, ztl432 issue 8 - april 2007 5 www.zetex.com ? zetex semiconductors plc 2007 typical characteristics i ka i ka i ka v ka v ka v ref < v ka < 20, i ka = 10ma, t a = 25c v ka v ka
ztl431, ztl432 issue 8 - april 2007 6 www.zetex.com ? zetex semiconductors plc 2007 application cicuits v on ~ 2v v off = v + v th = 2.5v output v+ input r1 r2 v out v out v+ v ref v ref r1 r2 v out v out v+ v ref v ref r1 r2 v out v out v+ v ref v ref v out(min) = v ref + v reg in out common zsr*** 0.01 f 30 r1 r2 v ref v+ v out v out v ref r1 r1 r2b r2a v ref v ref v ref v ref v+ output shunt regulator output control of a three terminal fixed regulator single supply comparator with temperature compensated threshold higher current shunt regulator series regulator over voltage / under voltage protection circuit
ztl431, ztl432 issue 8 - april 2007 7 www.zetex.com ? zetex semiconductors plc 2007 dc test circuits notes deviation of reference input voltage, vdev, is defined as the maximu m variation of the reference input voltage over the full temperature range. the average temperature coefficient of the reference input voltage, v ref is defined as: the dynamic output impedance, r z , is defined as: when the device is programmed with two external resistors, r1 and r2, (fig 2), the dynamic output impedance of the overall circuit, r' z , is defined as: stability boundary the ztl431 and ztl432 are stable with a range of capacitive loads. a zone of instability exists as demonstrated in the typical characteristic graph on page 5. the graph shows typical conditions. to ensure reliable stability a capacitor of 4.7nf or greater is recommended between anode and cathode. figure 1 test circuit for v ka = v ref figure 2 test circuit for v ka > v ref figure 3 test circuit for off state current i ka i ka i ka(off) i l i l v ka v ka v ka v ref v ref i ref i ref v ref ppm c () v dev 1 000 000 ,, v ref t1 t2 ? () ---------------- ------------------ -------------- - = r z v z i z --------- - = r ' z r z 1 r1 r2 ------- + ?? ?? =
ztl431, ztl432 issue 8 - april 2007 8 www.zetex.com ? zetex semiconductors plc 2007 pin connections - previ ew status devices ztl431_e5 sot235 (top view) ztl431_z sot89 (top view) n/c * cathode anode anode cathode anode ref ref 1 2 3 5 4 preview preview * pin 2 should be left floating or connected to pin 5 ztl431_c to92 (underside view) v z g nd v ref 1 2 3
ztl431, ztl432 issue 8 - april 2007 9 www.zetex.com ? zetex semiconductors plc 2007 packaging details - sot23 packaging details - sot23-5 note: controlling dimensions are in millimeters. approximate dimensions are provided in inches note: controlling dimensions are in millimeters. approximate dimensions are provided in inches e e l e1 d a c e1 l1 a1 b 3 leads dim. millimeters inches dim. millimeters inches min. max. min. max. min. max. max. max. a - 1.12 - 0.044 e1 1.90 nom 0.075 nom a1 0.01 0.10 0.0004 0.004 e 2.10 2.64 0.083 0.104 b 0.30 0.50 0.012 0.020 e1 1.20 1.40 0.047 0.055 c0.085 0.120 0.003 0.008 l 0.25 0.62 0.018 0.024 d 2.80 3.04 0.110 0.120 l1 0.45 0.62 0.018 0.024 e 0.95 nom 0.0375 nom - - - - - dim. millimeters inches min. max. min. max. a 0.90 1.45 0.0354 0.0570 a1 0.00 0.15 0.00 0.0059 a2 0.90 1.30 0.0354 0.0511 b 0.20 0.50 0.0078 0.0196 c 0.09 0.26 0.0035 0.0102 d 2.70 3.10 0.1062 0.1220 e 2.20 3.20 0.0866 0.1181 e1 1.30 1.80 0.0511 0.0708 e 0.95 ref 0.0374 ref e1 1.90 ref 0.0748 ref l 0.10 0.60 0.0039 0.0236 a 0 30 0 30
ztl431, ztl432 issue 8 - april 2007 10 www.zetex.com ? zetex semiconductors plc 2007 package details - sot89 package details - to92 note: controlling dimensions are in millimeters. approximate dimensions are provided in inches note: controlling dimensions are in millimeters. approximate dimensions are provided in inches d1 d a c b1 l e h e1 b e e1 c dim. millimeters inches dim. millimeters inches min. max. min. max. min. max. min max. a 1.40 1.60 0.550 0.630 e1 2.13 2.29 0.084 0.090 b 0.44 0.56 0.017 0.022 e 1.50 bsc 0.059 bsc b1 0.36 0.48 0.014 0.019 e1 3.00 bsc 0.118 bsc c 0.35 0.44 0.014 0.019 h 3.94 4.25 0.155 0.167 d 4.40 4.60 0.173 0.181 l 0.89 1.20 0.155 0.167 e2.292.600.0900.102 ---- dim. millimeters inches min. max. min. max. a 4.32 4.95 0.170 0.195 b 0.36 0.51 0.014 0.020 c 2.50 3.50 0.099 0.138 e 3.30 3.94 0.130 0.155 e 4.88 5.88 0.192 0.232 e1 2.44 2.94 0.096 0.116 l 12.70 15.49 0.500 0.610 r 2.16 2.41 0.085 0.095 s1 1.14 1.52 0.045 0.060 w 0.41 0.56 0.016 0.022 d 4.45 4.95 0.175 0.195 * 4 6 4 6
ztl431, ztl432 issue 8 - april 2007 11 www.zetex.com ? zetex semiconductors plc 2007 package details - sc70-6 package details sot23f note: controlling dimensions are in millimeters. approximate dimensions are provided in inches note: controlling dimensions are in millimeters. approximate dimensions are provided in inches d l1 c a1 b r bb e1 e e1 e l a e2 dim. millimeters inches dim . millimeters inches min. max. min. max. min. max. max. max. a 0.80 1.10 0.0315 0.0433 e 2.10 bsc 0.0826 bsc a1 - 0.10 - 0.0039 e1 1.25 1.35 0.0492 0.0531 a2 0.80 1.00 0.0315 0.0394 e 0.65 bsc 0.0255 bsc b 0.15 0.30 0.006 0.0118 e1 1.30 bsc 0.0511 bsc c 0.08 0.25 0.0031 0.0098 l 0.26 0.46 0.0102 0.0181 d 2.00 bsc 0.0787 bsc 0 8 0 8 dim. millimeters inches dim. millimeters inches min. max. min. max. min. max. max. max. a 0.80 1.00 0.031 0.0394 e 2.30 2.50 0.0906 0.0984 a1 - 0.10 0.00 0.0043 e1 1.50 1.70 0.0590 0.0669 a2 0.06 0.16 0.0024 0.0006 e2 1.10 1.26 0.0433 0.0496 b0.390.41 0.0153 0.0161 l 0.48 0.68 0.0189 0.0268 c0.110.20 0.0043 0.0079 l1 0.39 0.41 0.0153 0.0161 d2.803.00 0.1102 0.1181 r 0.05 0.15 0.0019 0.0059 e 0.95 ref 0.0374 ref o 0 12 0 12 e1 1.90 ref 0.7480 ref - - - - -
ztl431, ztl432 issue 8 - april 2007 12 www.zetex.com ? zetex semiconductors plc 2007 zetex sales offices europe zetex gmbh kustermann-park balanstra?e 59 d-81541 mnchen germany telefon: (49) 89 45 49 49 0 fax: (49) 89 45 49 49 49 europe.sales@zetex.com americas zetex inc 700 veterans memorial highway hauppauge, ny 11788 usa telephone: (1) 631 360 2222 fax: (1) 631 360 8222 usa.sales@zetex.com asia pacific zetex (asia ltd) 3701-04 metroplaza tower 1 hing fong road, kwai fong hong kong telephone: (852) 26100 611 fax: (852) 24250 494 asia.sales@zetex.com corporate headquarters zetex semiconductors plc zetex technology park, chadderton oldham, ol9 9ll united kingdom telephone: (44) 161 622 4444 fax: (44) 161 622 4446 hq@zetex.com ? 2007 published by zetex semiconductors plc definitions product change zetex semiconductors reserves the right to alter, without notice, specifications, design, price or conditions of supply of any product or service. customers are solely responsible for obtaining th e latest relevant information before placing orders. applications disclaimer the circuits in this design/application note are offered as desi gn ideas. it is the responsibility of the user to ensure that t he circuit is fit for the user?s application and meets with the user?s requirements. no representation or warranty is given and no liability whatsoev er is assumed by zetex with respect to the accuracy or use of such in formation, or infringement of patents or other intellectual prop erty rights arising from such use or otherwise. zetex does not assume any le gal responsibility or will not be held legally liable (whether in contract, tort (including negligence), breach of statutory duty, restricti on or otherwise) for any damages, loss of profit, business, con tract, opportunity or consequential loss in the use of th ese circuit applications, under any circumstances. life support zetex products are specifically not authorized for use as critic al components in life support devices or systems without the ex press written approval of the chief executive officer of zetex semiconductors plc. as used herein: a. life support devices or systems are devices or systems which: 1. are intended to implant into the body or 2. support or sustain life and whose failure to perform when proper ly used in accordance with instructions for use provided in t he labelling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support devi ce or system whose failure to pe rform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. reproduction the product specifications contained in this publication are issu ed to provide outline information only which (unless agreed by the company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the pr oducts or services concerned. terms and conditions all products are sold subjects to zetex? terms and conditions of sale, and this disclaimer (save in the event of a conflict bet ween the two when the terms of the contract shall prevail) according to region, supplied at the time of order acknowledgement. for the latest information on technology, delivery terms and condi tions and prices, please contact your nearest zetex sales off ice. quality of product zetex is an iso 9001 and ts16949 certified semiconductor manufacturer. to ensure quality of service and products we strongly advise the purchase of parts dire ctly from zetex semiconductors or one of our regionally authorized distributors. for a complete listing of authorized distributors please visit: www.zetex.com/salesnetwork zetex semiconductors does not warrant or accept any liability whatsoever in respect of any parts purchased through unauthorized sales channels. esd (electrostatic discharge) semiconductor devices are susceptible to damage by esd. suitab le precautions should be taken when handling and transporting dev ices. the possible damage to devices depends on the circumstances of the handling and transporting, and the nature of the device. the extent of damage can vary from immediate functional or parametric malfunc tion to degradation of function or performance in use over ti me. devices suspected of being affected should be replaced. green compliance zetex semiconductors is committed to envir onmental excellence in all aspects of its operations which includes meeting or exce eding regulatory requirements with respect to the use of hazardous s ubstances. numerous successful programs have been implemented to reduce the use of hazardous substances and/or emissions. all zetex components are compliant with the ro hs directive, and through this it is supporting its customers in their compliance with weee and elv directives. product status key: ?preview? future device intended for production at some point. samples may be available ?active? product status recommended for new designs ?last time buy (ltb)? device will be discontinued and last time buy period and delivery is in effect ?not recommended for new designs? device is still in production to support existing designs and production ?obsolete? production ha s been discontinued datasheet status key: ?draft version? this term denotes a very early datasheet ver sion and contains highly provisional information, which may change in any manner without notice. ?provisional version? this term denotes a pre-release datasheet. it provides a clear indication of anticipated performance. however, changes to the test conditions and specif ications may occur, at any time and without notice. ?issue? this term denotes an issued datasheet cont aining finalized specifications. however, changes to specifications may occur, at any time and without notice.

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